FOR DISTRICT HEATING OPERATORS
A permanent baseload heat source — with zero capital risk
Data centres run 24/7. Their waste heat is the most reliable, lowest-carbon heat source available at scale. We deliver it under a 20-year Heat Purchase Agreement — you carry no investment risk.
WHAT WE DO
From potential to operational heat recovery
WHAT YOU GET
The IHP proposition for DH operators
✓ At least 10% lower heat production costs
DC waste heat at COP 3.5–6 consistently undercuts biomass, gas and conventional heat-pump alternatives on levelised cost. The electricity cost per MWh is one-quarter to one-third of the electricity price — the primary driver of economics.
✓ Zero capital investment from you
Calentix owns the entire heat-recovery asset — heat exchangers, heat pumps, pipework and monitoring infrastructure. You sign an HPA and receive heat. All investment risk sits with us.
✓ One-third of the carbon footprint vs. gas
DC waste heat carries minimal additional carbon — directly supporting decarbonisation targets. Verified carbon accounting provided for your reporting obligations.
✓ 20-year price stability
HPA pricing indexed to an agreed formula — insulating your network from gas and biomass price volatility. A predictable cost structure for your long-term planning.
✓ Exceptional supply stability
Data centres operate at consistent loads year-round. Unlike industrial waste heat, servers don't take holidays or seasonal shutdowns. Our contracts specify a heat delivery band with guaranteed minimum volumes and uptime obligations backed by buffer storage.
PRE-FEASIBILITY ASSESSMENT
We help data center owners reduce energy use, recover excess heat, and strengthen sustainability performance. By integrating efficient heat-recovery systems to your cooling systems we lower operating costs and ensure compliance with EU energy-efficiency requirements. Calentix acts as both advisor and developer, making your energy systems smarter, cleaner, and more profitable.
FEASIBILITY STUDY
We support data center developers and landlords in creating more valuable and compliant sites. By connecting data centers to local district-heating networks, we turn waste heat into a new revenue stream and enhance your license to operate. Calentix designs, builds, and operates energy systems that make your facilities future-proof and attractive for your customers and investors.
PROJECT DEVELOPMENT
Once feasibility is confirmed, we structure the full project: technical design, permitting, contracts, and financing. Calentix acts as an independent heat producer, developing the project under an Independent Heat Produced model in cooperation with data center owners, utilities, and investors.
CONSTRUCTION AND OPERATION
We finance, build, and operate the heat-recovery system. We ensure performance, reliability, and long-term value. Over time, ownership can be structured in different ways depending on partner preferences and investment strategy.
TECHNICAL DETAIL
Temperatures, volumes and network integration
Delivery temperatures
Modern industrial heat pumps in DC applications reliably deliver 70–90°C. Fourth Generation District Heating networks (4GDH) at 55–70°C supply are particularly well suited and allow higher COP. Higher temperature requirements are achievable but affect efficiency.
Heat volumes & stability
A data centre with 10 MW IT load can supply 5–8 MWth. Unlike industrial sources, data centres operate at consistent loads year-round — servers don't take holidays. Buffer storage provides reserves during planned maintenance windows.
COP & economics
COP of 3.5–6 depending on season and network return temperature. At COP 5, electricity cost per MWh is one-fifth of the electricity price — significantly cheaper than gas or biomass alternatives on a levelised basis.
COMMON QUESTIONS
What DH operators ask us
The key criteria: (1) Data centre with liquid cooling and IT load above 2–5 MW. (2) Project within 1–2 km of
your network connection point. (3) Your network return temperature below ~55°C in summer – higher
return temperatures are harder for the heat pump. (4) Mandatory supply temperature we can match.
The feasibility study establishes all of this precisely.Our HAA with the data centre includes provisions for load variability. The HPA with you specifies a
delivery band rather than a fixed volume, giving both parties flexibility. Our monitoring tracks IT load
trends, and we design for scenarios where the facility expands — as is the typical trajectory for European
DCs in the AI era. We carry the risk of the DC relationship, not you.At a COP of 4, our electricity cost per MWh of heat is approximately 2.5 kWh of electricity —
versus ~11 kWh of gas at 90%+ thermal efficiency. At current electricity-to-gas price ratios across
our markets, DC waste heat recovery is consistently cheaper on a levelised basis than gas, biomass,
or conventional heat pump alternatives drawing from ambient sources.Only a metered connection point at the agreed delivery temperature. Everything upstream — the data
centre relationship, the heat pump system, construction, monitoring, regulatory reporting — is Calentix's
responsibility. A buffer storage tank at the heat pump station provides thermal reserve, giving you time
to bring alternative sources online if needed.